Meet the aliens in UK waters

http://news.bbc.co.uk/go/rss/-/1/hi/sci/tech/7669494.stm

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The seas surrounding the UK - and the rivers that flow into them - are filled with animal and plant species that originate far from our shores.

While some of these non-native invaders will die out over time, others are thriving - and are becoming a huge threat to biodiversity.

Here, two experts - Jack Sewell and Philine zu Ermgassen - explain how these alien invaders are affecting our ecosystems.

Slideshow production by Paul Kerley.

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<a class="bodl" href="http://www.marlin.ac.uk/">Marine Life Information Network - Marlin</a><a class="bodl" href="http://www.marlin.ac.uk/rml/">Record sightings of alien species through Marlin</a><a class="bodl" href="http://www.plantlife.org.uk/uk/plantlife-campaigning-change-invasive-plants.html">Plantlife website</a><a class="bodl" href="http://www.nonnativespecies.org/">GB Non-Native Species Secretariat</a>